Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f70dd0d7e9f263e…

MALICIOUS

PDF

70.9 KB Created: 2021-03-18 06:42:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a986d03a862d37678d90524b887e4ab6 SHA-1: 225deb247b32ced827e344a0b9356592cbfbba0f SHA-256: 1f70dd0d7e9f263ebdfa39933eddc74da026a5598c6ec0d70c32f00555702a2d
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers. Heuristics indicate it contains an external URI and a callback phishing lure, suggesting it aims to trick users into contacting a malicious entity. While no scripts were explicitly extracted, the presence of a malicious PDF often implies exploitation or embedded malicious content that could lead to further execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/123?utm_term=bwakila+audio++vichekesho
    • https://cdn.sqhk.co/sewadokoka/fjijhha/commuter_rail_boston_to_lowell_schedule.pdf
    • http://tiwimifozukimu.medianewsonline.com/how_to_make_crock_pot_chili_thicker.pdf
    • https://static.s123-cdn-static.com/uploads/4371523/normal_5fcea51ce4c2e.pdf
    • http://roboludawu.mywebcommunity.org/gugizatibosufonadev.pdf
    • http://medazuxa.mywebcommunity.org/47304724615.pdf
    • https://cdn-cms.f-static.net/uploads/4413240/normal_604cf1a02578c.pdf
    • https://cdn.sqhk.co/kebokeregim/gdv4gi7/best_rock_radio_station_chicago.pdf
    • https://cdn-cms.f-static.net/uploads/4383913/normal_601e73371e334.pdf
    • https://cdn.sqhk.co/govonesed/h5hgic7/history_of_asia_book.pdf
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5fdad60f53d08.pdf
    • http://rupazaduxil.mywebcommunity.org/89255526357.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lugenizuridaj.atwebpages.com/14011579019.pdf
    • https://uploads.strikinglycdn.com/files/f25fed9e-1833-4e28-8133-010c6a980319/zusowosatorumifed.pdf
    • https://s3.amazonaws.com/lurutopobi/speech_writing_format_cbse_class_8.pdf
    • https://s3.amazonaws.com/voxazedisula/pronoun_antecedent_worksheet_grade_4.pdf
    • https://s3.amazonaws.com/vuliwisuwig/volume_of_hollow_cylinder_in_liters_calculator.pdf
    • https://s3.amazonaws.com/xefezesebusu/vixama.pdf
    • https://uploads.strikinglycdn.com/files/443a420e-63f3-4a20-bcf4-ad19567bb041/my_favourite_pet_essay_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/db57fd58-ad50-422e-a23f-8186c8bde122/23071648607.pdf
    • https://uploads.strikinglycdn.com/files/8d3839c3-5942-4fd5-ba9a-2b1f375f07de/how_to_program_dish_hopper_remote_to_dvd_player.pdf
    • https://s3.amazonaws.com/mevuzokekenojab/waterless_car_wash_business_plan.pdf
    • http://duvodix.myartsonline.com/94408093300.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d919.bin
14a73c9ae12ac9c23dc31bfea42980fabfed3153cc7c554723599fcd6bbeeced		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD919 5196 bytes
font_01_sfnt_off0000eae4.bin
fc4c75b17324182b7c5f5eec6a758c993d9dfb9a842fe7f7d643570c54459936		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE4 10496 bytes

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